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Shell Chemical East (26336), Norco

LDEQ Accident Report

Accident #148703
PDF AvailablePDF
State Police #13-02045
Accident Date2013-05-10
Report Date 2013-05-16
Follow-up Date 2013-06-20
Follow-up: Yes

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Carbon Monoxide5d 16h8-84 RCCU Elevated Flare (FE-201)NOYESNO8,987.4 pounds
NOx5d 16h8-84 RCCU Elevated Flare (FE-201)NONOYES1,651.7 pounds
Particulate Matter5d 16h8-84 RCCU Elevated Flare (FE-201)NOYESNO310.9 pounds
Sulfur Dioxide5d 16h8-84 RCCU Elevated Flare (FE-201)NOYESNO645.9 pounds
Volatile Organic Compounds (VOCs)5d 16h8-84 RCCU Elevated Flare (FE-201)NONOYES4,441.4 pounds
Carbon Monoxide5d 16h1-90 (GO-1 Elevated Flare, FE-602)NOYESNO31.8 pounds
NOx5d 16h1-90 (GO-1 Elevated Flare, FE-602)NONOYES5.8 pounds
Particulate Matter5d 16h1-90 (GO-1 Elevated Flare, FE-602)NOYESNO1.1 pounds
Sulfur Dioxide5d 16h1-90 (GO-1 Elevated Flare, FE-602)NOYESNO157.2 pounds
Volatile Organic Compounds (VOCs)5d 16h1-90 (GO-1 Elevated Flare, FE-602)NONOYES9.3 pounds
Hexane5d 16h1-90 (GO-1 Elevated Flare, FE-602)NONONO0.7 pounds
Carbon Monoxide5d 16h5-84 (West Ops Elevated Flare, FE-601)NOYESNO1,816.5 pounds
NOx5d 16h5-84 (West Ops Elevated Flare, FE-601)NONOYES333.8 pounds
Particulate Matter5d 16h5-84 (West Ops Elevated Flare, FE-601)NOYESNO62.8 pounds
Sulfur Dioxide5d 16h5-84 (West Ops Elevated Flare, FE-601)NOYESNO10,547.3 pounds
Volatile Organic Compounds (VOCs)5d 16h5-84 (West Ops Elevated Flare, FE-601)NONOYES517.3 pounds
Butadiene5d 16h5-84 (West Ops Elevated Flare, FE-601)NONOYES7.2 pounds
Benzene5d 16h5-84 (West Ops Elevated Flare, FE-601)NONOYES1.5 pounds
Toluene5d 16h5-84 (West Ops Elevated Flare, FE-601)NONONO0.1 pounds
Hexane5d 16h5-84 (West Ops Elevated Flare, FE-601)NONONO45.0 pounds

Accident Classified As: Reportable Quantity

Cause of Problem: Piping or Tubing

On May 10, Motiva's Residual Catalytic Cracking Unit (RCCU) discovered a catalyst leak in the unit's second cyclone dip leg. Operations responded immediately and worked to isolate this section of the unit. However, due to the location of the leak it was determined the line could not be isolated without diverting the RCCU process unit to hot circulation. The diverting process required flaring at the GO-1 Elevated flare (EPN 1-90) and West Ops Ground Flare (EPN 9-84). Additional flaring occurred at the Motiva RCCU Elevated Flare (EPN 8-84). Emissions from that flare should be addressed in a separate letter from Motiva. The reintroduction of Motiva's RCCU untreated dry gas resulted in the shell GO-1 unit flaring to the West Ops Elevated Flare.

Discharge Preventable - No

This incident was not preventable by Shell Chemical. There are no direct controls of this stream by Shell Chemical.

Notes/Remedial Actions

Once system was secured, Motiva's maintenance personnel began repairs at the catalyst leak point. By May 12, the repairs on the system were completed and the system was returned to service. The diversion and reintroduction of RCCU Untreated Dry Gas caused the Shell GO-1 unit to flare to the GO-1 Elevated Flare (EPN 1-90) until unit specifications were met. This flaring exceeded reportable quantities.